Re: Questions about the DH Comet

Date:         17 Sep 97 02:49:25 
From:         Marc Schaeffer <marcmsc@geocities.com>
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David Lednicer wrote:
> The Comet had another problem that no one has touched upon here. It was
> possible to rotate the aircraft before sufficient speed had been reached
> to achieve a positive rate of climb.  This resulted in an accident, in
> Africa I believe.

There were two crashes due to this problem.
First occured with Comet 1 G-ALYZ (Sn6012) on the 26-Oct-52 at Rome. The
plane overshoot the runway and stopped finally with broken landing gears.
The plane was a hull loss.  Nobody killed.

Second occured with Comet 1A of Canadian Pacific CF-CUN (Sn 6014) at
Karachi (Pakistan) on the 03-Mar-53. All 6  passengers and 5 crew
killed. This bird was on it's delivery flight.

> The aircraft was rotated early and overran the
> runway, and hit immobile objects.

CF-CUN collided with a bridge and took fire.

> Leading edge devices were added to the Comet to fix this.

After the crash of CF-CUN it was found out that a considerable part of
the wing lost it's lift if the plane was pulled up too fast. A design
change of the leading edge flaps of the Comet wings was the solution to
this problem. This change proved to be sufficient.

Rgds,
Marc Schaeffer, Luxembourg // mailto:marcmsc@geocities.com
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